Feat: tenant llm provider (#14595)

### What problem does this PR solve?

Python implementation of the Go-based model_provider API suite.

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

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Co-authored-by: bill <yibie_jingnian@163.com>

web/src/pages/user-setting/interface.ts

@@ -1,4 +1,5 @@
 export interface ApiKeyPostBody {
+  instance_name: string;
   api_key: string;
   base_url: string;
   group_id?: string;